Senior Fullstack Engineer · Backend-focused
Armorx.ai · Vietnam · Remote-friendly
I build the server side of production web applications — Node/NestJS services, relational and document data layers, and the self-hosted DevOps that runs them. I ship the React front-end when the product needs it.
Available for senior fullstack roles
The tools I use every day, with years of production experience.
Node.js (6y) · React (6y) · TypeScript (5y) · MongoDB (4y) · NestJS (3y) · PostgreSQL (3y) · Next.js (3y) · Docker (2y)
Focus areas: API Design · Microservices · System Design · Data Modeling · CI/CD · DevOps
The signals HR and tech leads ask me about most often.
I design the service layer and the data model behind it — Node/NestJS APIs, relational and document schemas, and the right topology for the problem (microservices, event-driven, or a monolith that stays one). I have taken payment, logistics, and event platforms from schema to production.
Services do not stop at the merge. I own deployment and production ops — Docker, GitHub Actions CI/CD, Nginx reverse proxies, Cloudflare edge, and self-hosted Linux VPS — including monitoring, log aggregation, and uptime alerts.
3 peer-reviewed papers on blockchain-based IoT authentication and malware propagation modeling — IEEE Xplore, MDPI Electronics, and Springer.
Cybersecurity platform providing ransomware detection, endpoint monitoring, and device management solutions for enterprise customers.
Self-led venture run alongside my Armorx.ai role — a proxy management platform for web scraping, SEO monitoring, and ad verification workflows.
Event management SaaS — registration, attendee engagement, and post-event analytics for conference and event organizers.
Peer-reviewed research papers on blockchain-based IoT authentication and malware propagation modeling — published in IEEE Xplore, MDPI Electronics, and Springer.
Proposes a model describing the spreading of malware in Wi-Fi networks using an epidemiological mathematical model. Calculates basic reproduction number R0 and indicates conditions to limit spread.
Proposes SEIR-S mathematical model based on VANET network characteristics and the SIR disease-spreading model. Verified using numerical analysis and agent-based simulation on NetLogo.
Research and proposal for a blockchain-driven hybrid model for IoT authentication. Shows promising results on the Ganache blockchain.
A proxy management platform for web scraping, SEO monitoring, and ad verification — proxy pool management, IP rotation, and usage analytics behind a developer console. Built and operated end to end on self-hosted infrastructure: Docker, GitHub Actions CI/CD, Nginx reverse proxies, and Cloudflare edge.
A platform serving real-time construction material prices across 34 Vietnamese provinces, sourced from provincial Departments of Construction — including a public VLXD Price API for developers. Also provides house cost, material quantity, and interior cost estimators.
A cinema seat-booking service built around the concurrency problem — Redis-backed locking so two users can never claim the same seat under simultaneous load.
Learn how to build your own Redis cache tool using Node.js.
Race conditions are not a new problem, but they remain one of the most common issues in systems that scale to millions of requests. Your application may appear to be running correctly, yet the data becomes inconsistent, and you may not immediately understand why.
Greedy algorithms are a powerful tool for solving optimization problems. In this post, I share my insights on how to recognize when a greedy approach is applicable and how to implement it effectively.
Have a role or project you'd like to discuss? The fastest way to reach me is email or LinkedIn. I usually reply within a day.